package com.example.thread;


import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

class ShareData{
    //A:1 B:2 C:3
    private int number = 1;
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void printFive(){
        lock.lock();
        try {
            //1.判断
            while(number!=1){
                //wait
                c1.await();
            }
            //2. 干活通知
            for (int i = 0; i < 5; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //3.通知
            number=2;
            //如何通知第二个,,,
            c2.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void printTen(){
        lock.lock();
        try {
            //1.判断
            while(number!=2){
                //wait
                c2.await();
            }
            //2. 干活通知
            for (int i = 0; i < 10; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //3.通知
            number=3;
            //如何通知第二个,,,
            c3.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }

    public void printFifteen(){
        lock.lock();
        try {
            //1.判断
            while(number!=3){
                //wait
                c3.await();
            }
            //2. 干活通知
            for (int i = 0; i < 15; i++) {
                System.out.println(Thread.currentThread().getName()+"\t"+i);
            }
            //3.通知
            number=1;
            //如何通知第二个,,,
            c1.signal();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            lock.unlock();
        }
    }
}

/**
 * @author: ZL
 * @Date: 2020/5/13 10:55
 * @Description:
 * 备注: 多线程直接按照顺序调用，实现A->B->C->
 * 三个线程启动，，要求如下：
 * AA打印5次，，BB打印10次，，CC打印15次
 * 接着
 * AA打印5次，，BB打印10次，，CC打印15次
 * 来10轮
 */
public class ConditionDemo {
    public static void main(String[] args) {
        ShareData shareData = new ShareData();
        new Thread(() ->{
            for (int i = 0; i < 10; i++) {
                shareData.printFive();
            }
        },"A").start();
        new Thread(() ->{
            for (int i = 0; i < 10; i++) {
                shareData.printTen();
            }
        },"B").start();
        new Thread(() ->{
            for (int i = 0; i < 10; i++) {
                shareData.printFifteen();
            }
        },"C").start();
    }
}
